//==============================================================================
//	
//	Copyright (c) 2002-
//	Authors:
//	* Andrew Hinton <ug60axh@cs.bham.ac.uk> (University of Birmingham)
//	
//------------------------------------------------------------------------------
//	
//	This file is part of PRISM.
//	
//	PRISM is free software; you can redistribute it and/or modify
//	it under the terms of the GNU General Public License as published by
//	the Free Software Foundation; either version 2 of the License, or
//	(at your option) any later version.
//	
//	PRISM is distributed in the hope that it will be useful,
//	but WITHOUT ANY WARRANTY; without even the implied warranty of
//	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//	GNU General Public License for more details.
//	
//	You should have received a copy of the GNU General Public License
//	along with PRISM; if not, write to the Free Software Foundation,
//	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//	
//==============================================================================

package userinterface.util;

import java.util.*;

public interface PropertyOwner extends Comparable
{
    //One for each type of owner
    public int getUniquePropertyID();
    //One for each owner
    //This will be displayed when only
    //this owner is being displayed.
    public String getDescriptor();
    //ONe for each type of property collection
    //When only one owner is being displayed,
    //we see the result of this method, and then
    //the result of getDescriptor.
    //If there is more than one owner being
    //displayed, we see the number of
    //owners, then the result of this method
    //followed by an "s".
    public String getClassDescriptor();
    
    public int getNumProperties();
    
    public SingleProperty getProperty(int index);
    
    public void registerObserver(Observer obs);
    
}
